Wide Delta E fiting for data and signal table

Data

Mode data N1 data N2 wide N1 wide N2
0 25757 26254 26187 26743
1 50351 50621 51082 51195
3 39782 39682 40790 40769
200 40188 40677 41162 41565
201 13071 12980 13114 13217
202 5770 5848 5877 6012
203 13332 13184 13469 13511
204 8281 8290 8372 8289
205 3527 3508 3622 3599

Signal MC

Mode MC N1 MC N2 wide N1 wide N2
0 20617 20950 20901 21217
1 69752 70842 70205 71368
3 46661 46771 47619 47735
200 43894 44276 44726 45168
201 20766 20814 20623 21207
202 36537 36171 9341 9190
203 13304 13322 13379 13409
204 12582 12440 12785 12646
205 9399 9409 9512 9509

Problems in the fit

Use the same regular evt file as Peter's to fit.

Plan

Calculate by :

      ( data yield wide Delta E)          (MC yield wide Delta E)
 ( ------------------------------- ) / ( -------------------------- )
     ( data yiels regular Delta E)       (MC yield regular Delta E)

Email from Anders 


 for the D-hadronic branching fraction analysis we need to do
a few fits to check for systematics. As you have the 'fitting
machinery' going I wonder if you can help out with some of
these fits.

 For more details you can see CBX 05-08. The fits that we looked
at before was (single tags)

 1) the loose DeltaE fits to check for systematics due to the
    DeltaE cut. Peter told me that he has the samples needed to
    do these fits. This was done on data and MC to check that
    the changes we saw in data and MC agreed. If they do not
    agree - we have a source of systematic uncertainty.

 2) We did alternative fits to determine fitting systematics,
    i.e., how sensitive are we to the assumptions made about
    the signal and background shapes used in the fits. We did
    the following variations:

    - Changed Gamma(psi(3770)) from the default of 30.6 MeV to
      23.6 MeV and 35.0 MeV.

    - We fixed the power "p" parameters in the Argus shape
      to be 0.5.

[ Front | MyDHad | Index ] Updated January 13, 2007